Are you really serious that Nokia has nothing in place to triage bugs? Their developers just work on what they feel like? Here are a few that I have personally witnessed since "upgrading".
Modest where crashes range in level from annoying to frustrating as it takes out hildon-desktop. ( they have had this problem for MONTHS without resolution ). Bugzilla just upgraded this bug to "high priority" this morning.
RTCom updates? This is one of the more stable Nokia software products and it somehow missed the cut.
VoIP still seems to need prodding to produce volume. This is on top of the purely functional issues with the VoIP and messaging UI's.
Year old firefox render engine
GPS, now with an unstable A-GPS support that effectively brings down the GPS subsystem when it fails
browserd which will consume 100% of the memory in the unit, doesn't handle keyboard shortcuts properly
Failed connections to networks will leave the network in the connections list until a reboot
And these are all bugs that I have run into since flashing to diablo. Each one is either a) because of new Nokia software or b) an existing, well known bug from Chinook.